Concurrent Video and Data Streaming using IEEE 802.11ac

1. Concurrent Video and Data Streaming using IEEE 802.11ac Final Capstone Presentation Team # 5 Aesha Parikh AkhileshTinniyamKannan Nilay Parikh SreeSagarRaghavendra Industry Advisor: John Blakely Principal Wireless Architect CenturyLink, Inc. Faculty Advisor: Dr. Thomas Schwengler Adjunct Instructor, EE Department University of Colorado Boulder

2. Introduction Background • Increase in number of wireless clients in residential networks • Higher quality of experience demanded by users • Concurrent video and data streaming requirements • 802.11n: Current state-of-the-art • Large number of devices operating in 2.4GHz • 802.11ac: Proposed technology • 5GHz: Free and clear spectrum References: • “802.11ac In-Depth,” WP_80211acInDepth_041414, Aruba Networks, Inc., Sunnyvale, CA, 2014. • “Cisco Visual Networking Index: Global Mobile Data Traffic Forecast Update, 2013–2018,” Cisco.

3. Introduction Statement of Problem

4. Introduction Research Question • Is 802.11ac a practical replacement for 802.11n for video and data distribution in a residential setting to address the performance issues of 802.11n? • Are 802.11ac devices capable of simultaneously handling HD (High Definition) live video, VOD (Video on demand), and data streams while ensuring good quality of experience? Subproblems • Satisfying QoS requirements for concurrent video and data streams • Number of simultaneous data and video clients supported • Throughputs achieved for TCP and UDP streams at different ranges in a residential setting

5. Introduction Extending the state-of-the-art | Novelty of research • Previous research has shown that 802.11n fails for concurrent video and data streaming inside residential network • Test case to support the large-scale roll-out of 802.11ac for this application • 802.11ac has inherent advantages over 802.11n at the PHY and MAC layer (Channel size, Modulation, Beamforming) • 802.11ac provides high throughputs to multiple clients, unlike 802.11n • Test results to support the use of UDP as the transport protocol for video streams inside a residential network References: • V. Vora and T. Brown, “High rate video streaming over 802.11n in dense Wi-Fi environments,” in 2010 IEEE 35th Conference on Local Computer Networks (LCN), pp. 1054–1061, 2010. • M. Gast, 802.11ac: A Survival Guide. O’Reilly Media, Incorporated, 2013.

6. Introduction • Successful project: Test results validates the research hypothesis • One of the first works that focus on detailed testing for concurrent video and data streaming using 802.11ac • Submitted paper to IEEE PIMRC conference (September 2014)

7. Test Setup Test Parameters • 802.11ac Access Point – Carrier grade • Number of transmitting antenna – 4 • Channel width – 80MHz • Channel number – 157 • Number of iterations of each test – 10 • Duration of each test – 60 seconds (IETF Recommended)

8. Test Setup Test location 1 • Discovery Learning Center – University of Colorado Boulder • Emulating residential setting Over-The-Air (OTA) • Ixia’s IxChariot 7.30 | Xeon E-5 2600 Servers | 802.11ac AP Test location 2 • CenturyLink, Inc. – Littleton, CO • RF isolated chamber | Lab environment | Copper meshed walls • IxiaVeriwave chassis | WaveQOE to generate traffic profiles

9. Test Setup Test locations

10. Research Methodology and Results Test 1: SLA Test - Setup • Testing the performance of 802.11ac and 802.11n while conforming to stringent SLA requirements • Maps to the first subproblem • 20 clients emulating a residential network • Protocols emulated: TCP, UDP, VoIP, RTP, RTPVideo

11. Research Methodology and Results Test 1: SLA Test – Results 802.11n 802.11ac

12. Research Methodology and Results Test 2: Maximum Client Test - Setup • Identifying the maximum number of clients supported while satisfying SLA requirements • Maps to the second subproblem • The number of clients incremented linearly from 20 clients • Heavily dependent on the DUT (Device Under Test) Test 2: Maximum Client Test - Results • Maximum of 28 clients satisfied SLA for the DUT • Simultaneous transmission of multiple protocols like FTP, UDP, TCP, VoIP, and RTPVideo

13. Research Methodology and Results Test 3: Rate vs. Range Test - Setup • Testing the effect of distance on the throughput of 802.11ac and 802.11n devices • Maps to the third subproblem • RSSI levels ranging from -45dBm to -75dBm Test 3: Rate vs. Range Test - Results

14. Research Methodology and Results Test 3: Rate vs. Range Test - Results

15. Discussion of Results • Latency (13.2ms) and Jitter (1.5ms) satisfy IEEE specified SLA (20ms) and maintains a high QoE for the users (0 packets lost) • Supports potential increase in the number of clients and rise in bandwidth requirements • High throughputs values (400Mbps – 800Mbps) obtained at various RSSI levels within a residence • Exposes the incompetence of 802.11n for the targeted application

16. Conclusion • This presentation shows the throughput and QoS statistics for 802.11ac and 802.11n • Test results support the use of UDP as a transport protocol for video streams in a residential WLAN • 802.11ac is a practical replacement for 802.11n for concurrent video and data streaming • 802.11ac can be widely deployed to provide better QoE for the users

17. Future Research • This research can be used as a reference for 802.11ac testing • Use of 160MHz channel when available • Usage of MU-MIMO, which can further enhance the results • Extension of this application for an enterprise setting • Testing the impact of various codec algorithms on video bitrates

18. Acknowledgement Dr. Thomas Schwengler John Blakely Dr. Tim Brown Dr. David Reed Jose Santos Mark Dehus ZubinIngah Tony Bieniek Bernie McKibben Steve Glennon VikasSarawat NeeharikaAllanki Charles Cook Drumeel Thakkar

19. Thank You Group 5 TLEN 5710 CapstoneUniversity of Colorado Boulder